Handling "No Passkey Found" in Discoverable Credentials Flow

[divya-sampath]

Hello,

I am working to implement a discoverable credentials workflow. I'm aiming to create a user experience where, if a user does not have a passkey registered for our application on any device, they are automatically prompted to create one.

What is the correct way to detect the absence of a discoverable passkey for a user?

Does the navigator.credentials.get() method ever throw a NotFoundError in a discoverable credentials context (i.e., when allowCredentials is empty)? My current observation is that a NotAllowedError is thrown if the user cancels the prompt, even when no passkey is found, which makes it difficult to distinguish between user cancellation and the "no passkey found" scenario.

Any guidance on how to programmatically handle this specific scenario would be greatly appreciated.